This rulemaking will consider revisions to the regulations that allow for the open burning and detonation (OB/OD) of waste explosives. The allowance or “variance” to the prohibition on the open burning of hazardous waste was established at a time when there were no alternatives to the safe treatment of waste explosives. However, recent findings from the National Academies of Sciences, Engineering, and Medicine and the EPA have identified safe alternatives which are potentially applicable to treating some energetic/explosive waste streams. Because there may be safe alternatives in use today that capture and treat emissions prior to release, the EPA is considering revising regulations to describe specific procedures for the existing requirements for evaluating and implementing alternative treatment technologies, when available.